Tv-nielsen
character generator



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED DECEMBER 16, 1969 wur mam LOGIC svsrzu f 'afgg" cmucrsa s11: sir:

A character generator draws characters upon the face of a cathode ray tube by drawing straight line strokes. Each character has its own circuit board so that characters may be changed merely by changing individual circuit boards. In one embodiment each character lboard generates all of the needed voltages using a voltage divider and applies these voltages to the outputs where each output represents a stroke. In another embodiment, each component, either horizontal or vertical, consists of one of five values or combinations thereof. Each character circuit board connects the proper number of lines to represent the correct length of the component.

Also disclosed is a novel switching circuit consisting entirely of diodes wherein the bias for a diode is derived from the voltage drop across another diode.

Also disclosed is a novel buflfer amplifier whose biases are derived using diodes.

Dec..16, 1969 A. 1'. NIELSEN CHARACTER GENERATOR Filed Sept. 7, 1967 6 Sheets-Sheet 1 ASGER T. NIELSEN mm sl X0040 Jofizou lll mam m-6 mm$ m xu Y B A IIOON wfiwmmmw 259m 063 22E his om A MM 5382 mmhuqmqxo Ma Dec. 16,1969 A. T. NIELSEN T869,002

CHARACTER GENERATOR Filed Sept. 7. 19s? e Sheets-Sheet 2 FIG 4 ASGER T- NIELSEN 1 i l 'VENTOR. L J BY ATTORNEYS INPUTS 6 Sheets-Sheet 5 Filed p 7. 1967 ASGER I. NIELSEN lNVE-NTOR.

BY Q /5 a ATTORNE YS A; r.- N IELSEN T869 002- Dec. 16, 1969 v CHARACTER GENERATOR Filed Sept. 7, 1967 6 Sheets-Sheet 4 RING COUNTER I FLIP-FLOP #4 OUTPUT "1' SUMMING JUNCTION OUTPUT a4 as 3: 0352 NTEGRATING E u! CAPACITOR T ASGER' 'r. NIELSEN g A INVENTOR. SUMMING JUNCTION BY Z ATTORNEYS Dec. 16, 1969 A. T. NIELSEN CHARACTER GENERATOR 6 Sheets-Sheet 5 Filed Sept. 7, 1967 m wE w 9m mm mm A865? 7.. NIELSEN MON INVENTOR.

ATTORNEYS Filed Sept, 7 1967 CHARACTER GENERATOR NIELSEN CLOCK PULSE 6 Sheets-Sh 6 FIG. 9

ASGE'R T. NIELSEN ATTORNEYS 

